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Andro Corp Industries Bravo 5.56 NATO Complete Upper Receiver - 16" 4150 CMV Barrel, 15" M-LOK Free-Float Handguard, Mid-Length Gas System, 7075-T6 Aluminum Receiver, Matte Black Anodized Finish - U55616ML / 736684144562
Product Description
Assembling an adaptable defensive rifle, configuring a modern sporting platform, or preparing a hard-use tactical long gun staging framework requires a barreled upper receiver built to absolute headspace and gas efficiency metrics. Low-grade commercial conversions often run over-gassed, accelerating internal bolt carrier wear, or utilize heavy, non-stabilized handguards that shift point-of-impact under accessory weight on your bench. The **Andro Corp Industries® Bravo 16" 5.56 NATO M-LOK Upper Receiver (U55616ML / 736684144562)** completely flatlines these cycling and interface bottlenecks, supplying a factory-headspaced **complete barreled upper package** centered around a sleek 15-inch modular free-float forearm.
Proudly assembled, calibrated, and test-fired in the United States by Andro Corp Industries, this high-performance upper receiver is structured from a forged **7075-T6 aircraft aluminum alloy** shell treated with a deep, non-reflective Mil-Spec Type III hard-coat anodized layer. Nested in the heart of the block is a premium **16-inch 4150 Chrome Moly Vanadium (CMV) steel barrel** configured with a versatile 1:7 twist rate and an ultra-durable melonite outer finish. Operating on a smooth **mid-length gas pathway**, this setup noticeably limits harsh bolt speed and reduces felt recoil impulse when compared to harsh carbine-length gas tubes. Wrapped in a rugged, low-profile **15-inch free-float aluminum M-LOK handguard** featuring a continuous top Picatinny rail, this turn-key tactical assembly upgrades your custom rifle build straight from your workbench.
Engineered to drop instantly onto standard mil-spec lower receiver pins, this factory-calibrated complete upper assembly ensures absolute reliability directly from your workspace bench.
*Armorer Bench Notes & Real-World Upper Staging Guidance: The Andro Corp U55616ML complete barreled upper assembly arrives workspace ready, containing the pre-machined 7075 upper shell, forward assist, dust cover door, 16" melonited barrel, low-profile gas block, mid-length gas tube, 15" free-float M-LOK handguard, and a factory-timed A2 birdcage flash hider. MIL-SPEC PIVOT AND TAKEDOWN INTERFACE MATRIX: The lower alignment lugs are engineered natively, strictly, and dimensionally to drop onto **any standard AR-15 mil-spec lower receiver chassis featuring 0.250-inch pivot and takedown pin lanes**. *BCG and Charging Handle Completion Checklist:* Please note that this specific SKU is a *barreled upper layout group* and does **NOT include a Bolt Carrier Group (BCG) or Charging Handle** on your bench. To complete the staging layout, verify you have a quality 5.56/.223 full-auto profile BCG and standard charging handle ready. Armorer Workbench Custom Staging Sequence: 1. Visually and physically confirm your host lower receiver is completely clear of live ammunition, the magazine is removed, and the fire control area is safe. 2. Apply a thin layer of high-efficiency weapon grease to the outer operational tracks of your separate bolt carrier group and charging handle. 3. Insert the charging handle into the upper receiver tracking slots, drop the bolt carrier array into the cavity, and slide the assembly completely forward into lockup battery. 4. Lay the completed upper receiver structure onto your host lower receiver frame, aligning the front pivot pin holes first. 5. Push the lower receiver\'s front pivot pin horizontally through the upper yoke, pivot the upper down flush, and pop the rear takedown pin home. 6. Pull the charging handle rearward manually several times to verify buttery smooth action cycling and absolute extraction alignment before choosing optics downrange.*
Key Features
- 16" 4150 CMV Melonited Barrel: Precision-milled from tough Chrome Moly Vanadium steel alloy and finished with an ultra-hard melonite coat to resist heat erosion and trail wear.
- Smooth Mid-Length Gas Action: Employs a mid-length gas pathway that softens the pressure curve, dramatically reducing internal part stress and felt recoil over traditional carbine systems.
- 15" Slim Free-Float M-LOK Handguard: Features an ultra-lightweight free-float aluminum shroud with M-LOK tracking slots at the 3, 6, and 9 o'clock lanes, isolating the barrel for maximum accuracy.
- Forged 7075-T6 Mil-Spec Receiver: Upper body is forged from high-tensile 7075-T6 structural aircraft aluminum alloy, complete with an integrated forward assist and spring-loaded dust cover door.
- Versatile 1:7 Twist Rate: The heavy-duty rifling twist configuration stabilizes a massive range of tactical and defensive projectiles, ranging seamlessly from 55-grain plinking rounds up to heavy 77-grain duty match ammunition.
- Muzzle Threaded 1/2x28 w/ A2 Hider: The muzzle end is threaded standard 1/2"-28 TPI and comes pre-fitted with a factory-timed A2 birdcage flash hider to disrupt night visual bloom.
Product Specifications
- Brand: Andro Corp Industries® (Winter Garden, Florida / Sourced US Materials)
- Model Line: Bravo Series Complete Factory Assembled Barreled Upper Receiver Systems
- MPN/SKU Code: U55616ML (5.56 NATO 16-Inch M-LOK Anodized Black Specification Base SKU)
- UPC Code Profile: 736684144562
- Firearm Lower Frame Compatibility: Standardized Mil-Spec AR-15 / M4 Lower Receivers Natively (0.250" Pin Layout)
- Ammunition Caliber Staging: 5.56x45mm NATO Caliber Chambering (Safely Accepts .223 Remington)
- Total Barrel Length Profile: 16.0 Inches (~406.4 mm Legal Non-NFA Carbine Standard Depth)
- Barrel Material Architecture: 4150 CMV (Chrome Moly Vanadium) Steel Alloy Tube Stock
- Barrel Surface Treatment: Complete Liquid Melonite QPQ Matte Black Anti-Wear Hardening Shell
- Rifling Twist Rate Metric: 1:7 Inches Right-Hand Button-Rifled Twist Trajectory
- Gas Operational System Type: Direct Impingement Mid-Length Gas System Track
- Gas Block Specification Base: 0.750-Inch Diameter Ultra Low-Profile Micro Steel Block (Set Screw Lock)
- Handguard System Profile: 15.0-Inch Aluminum Free-Float Handguard With Perimeter M-LOK Slots
- Muzzle Attachment Interface: 1/2"x28 TPI (Threads Per Inch) Standard Muzzle Thread Track
- Muzzle Device Extension: Mil-Spec A2 Birdcage Flash Suppressor (Timed with Crush Washer)
- Full Kit Component Checklist: 1x Assembled 16" Upper Receiver, 15" M-LOK Rail, Gas System, A2 Hider (BCG/Handle NOT Included)
- Packaging Format Class: Factory Original Sealed Andro Corp Heavy-Wall Industrial Shipping Container Box
- Product Type Category: Rifle Components / Complete Barreled Upper Receiver Assemblies
- Overall Structural Unit Width: ~2.10 Inches (~53.3 mm Slim Charging Track Clearances)
- Overall Physical Component Length: ~24.25 Inches (~615.9 mm Total Assembled Linear Space)
- Net System Operating Mass: ~3.45 Pounds (~1.56 Kilograms Lightweight Front Balance Base Weight)
- Global Quality Certifications: Formulated to Rigid US Commercial and Professional Duty Staging Standards
- Warranty Tracking Protection: Fully Backed by Andro Corp Industries Factory Product Guarantee
